Exhauster mechanism



x 0., m w o 6 n r T 2 mcd/nh s M L Q, l y V. M8 l QB Kw, P cm1 A 0H gARQ @u LEu 5 ao n GWA J u 7. 29m Hmm a we A, am e n 6 llmn/lumn u nd5.., a, 5 4*, 4 -4 .52 3 2 M W w 5 n f am .Y ya 4u 1, 5 j 3 0 .L Lm M onM J Patented Mar. 3, 1953 U-Nirsn i'Pix-r.eN-'r OFFICE .FThis inventionrrelatesz'to fan 'orfblower zdnstallations, and more particularly'ltodevioesof this' `character which `are .'adapted. tol `exhaust un- Wantedair.

It is onefobject'of this inventioneto'.provide` an' exhaust unit whichis readily adaptable' tofexist ing structures without materialalterations; and which is easily assembled and disassembled fwith outresorting' to special tools or theilike.

It is anothero'bject'of this'invention toffpro' vide' an exhaust unitentirely complete in` itself, and which mayv thus'beinstalled withoutrequiring supplemental structures `or mechanisms.

The operationof ordinary exhaust mechanisms adapted for ceiling usehasbeen characterized by high velocity verticali-drafts "which createairtur'- bulence and which donot directlyxprovideifor a resultantmovement or an exhaust of air from non-adjacent areas. in the. room....It is accordingly a furtherobject of this invention to provide an. iimproved exhauster i iunitrf-` 'which-P` `obviates these diiiiculties byexhaustingtfair-evenlyrand eiciently from allhorizontal directions atthe ceiling level, thereby continually exhausting. the most contaminatedair.

This invention-possesses many yother advantages, and has otherobjects'whichmay `bemade more clearly apparentrfrom a"considera.tionofone embodiment ofthe invention.`A :For this .purpose there is shownaform inl .th1drawingsac-.- companying andV forming part fof.thexpresent specification. 'IheA form will nowbe described in detailillustrating the general principlesoflthe invention; but itis'to"be"understood that" this detailed description is notltobettaken ina limiting sense since the scope,.of.this invention.- is best defined,by the appended claims.

Referringfto the drawings:

Figure 1 is a vertical elevation, partly in section, showing theexhauster unit in assembled position;

Fig. 2 is a plan view, with the dome defiector partly broken away;

Fig. 3 is an expanded pictorial view illustrating the cooperation andmode of assembly of the component parts of the structure;

Fig. 4 is a sectional view on an enlarged scale taken along the plane4-4 of Fig. 1; and

Fig. 5 is a vertical elevation, partly in section, similar to Fig. 1,but showing a modified adaptation of the eXhauster unit to a ceiling.

A mounting base it is adapted to be secured over a hood I I, which formsthe mouth of an air duct I2. This base IU is made of plywood or othersuitable material and is secured to the ceil- 2 ingr :I3Vby#appropriate` Vfastening means (not shown) to be either `iiush withthe ceiling I3 or overlapping slightly as illustrated in Fig. 1. In theform illustrated in- Fig. 5, the air duct `I2 isv shown extending to theceiling I3. In this instanceAv lthe entire structure is mounted beneaththe ceiling I3. The mounting `base I0 is here mountedl on a frame 5U,which frameis substantially equivalent in function to the hood II.

' 'The mounting base I0 is provided with a circularropening I4i.throughwhich part of, the blowerassembly I5 passes. This'assembly I5` includesanlouter'cylindrical shell or housing I5. The housing I5 provides aninlet end 54 and outlet end 55. for the passage of air through .the

y blower assembly I5. The'blower housing I5' is provided with a.shoulder. I6 .which abutsthe mounting structure "I0 'adjacent theopening I4 (see Fig; 4).

.In order to secureV the assembly to.. the structur'eIl), brackets "I1areperipherally mounted on the housing I5 adjacent vthe. shoulder I6 asby bolts1l8. These brackets .have apertured ears contacting themountingstructure ,I0. Passing through `each of kthese apertured earsare threaded Shanks 5I .of a knurledthumb screw I9; these Shanks. 5I,extendinto the .basel D and threadedly engage ,the nut 52, whichisappropriat'ely provided against rotation in. a.recess.,53oi the..base.|0.

.;Electric power is .suppliedtc the. blower assembly I5 .through theiiexible conduit .2li (as for examplc,. armored .ca-ble) appropriatelybrought into.theconineev of the. hood` I-I ofFig. l. or the frame'ofFig. 5; `the.junctiongboxI .receives the conduit 2.6. and. houses themechanism which serves optionallyto connect the blower assembly lead' 22to theconduitfZ .in themanner bereinafter` described.

The junction box 2l is mounted on the mounting 'base I0 and is providedwith a cover plate 23. A conventional type plug 24 having prongs 25 issecured to the lead 22, these prongs being detachalbly received in thesocket 26. The pull chain or cord 2'I operates the circuit controller 28for optionally -controlling the electrical connection to the assemblyI5. The circuit controllerl may be a standard type toggle switch havinga. stem tiltable by operation of the chain or cord 21. A pilot light 29is mounted on the cover plate 23 and is so connected in the circuit thatit will glow when the switch 28 has been operated to establish anelectrical connection between the conduit 2U and the socket 26. Thepilot light 29 thus serves to indicate when the blower is in operation.An

air deiiector, in the form of a dome shaped structure 3D, made of thinmaterial, is hollow and is adapted substantially to surround the endportion of the blower housing (I5'), the concave portion of thedeflector 30 facing the inlet end 54 of the housing I5' and spacedtherefrom. For the purpose of mounting the dome 3B adjacent the inletend 54 of the housing I5', a plurality of spring fingers 3! are attachedto the inner hollow portion of the dome 36. These spring fingers areadapted resiliently to engage an annular lip or flange 32 on the blowerassembly housing I5', thus holding the donne 39 firmly in place; thespring fingers 3l can be released from the ange 32 upon the exertion ofa slight outward pressure on one of the spring iingers 3| for purposesof disassembly for cleaning, repair, or replacement. 'I'he springfingers 3l can be caused to engage the ange 32 upon the exertion of asmall upward force on the dome 36.

The annular lip portion 33 of the dome 30 is of greater diameter thanthe diameter yof the blower housing I5'; thus when the blower assemblyI5 is operative, air flows horizontally at the ceiling level from alldirections over the lip 33 into the hollow interior of the dome 35, andthence upwardly through the blower assembly I5 and the air duct I2,which path is clearly indicated byV the arrows of Figs. 1 and 2. Thedome 3E! thus confines the air so that it enters from a directiontransverse to the axis of -the blower assembly I5, thereby preventinghigh velocity drafts and pre-- venting turbulence in the surrounding airby guiding the iiow oi air for smooth and eflicient exhaust at theceiling level, the level at which heat, smoke and grease are most dense.The dome 39 also provides for the collection of dust, or other debristhat may fall from the blower assembly I5 or from the air duct I2,thereby preventing contamination of objects in the space below.

The exliauster unit as described permits ready replacement of thevarious parts. Thus, for instance, the blower assembly may be removed asa unit without disturbing any permanent electrical connections. The plug24 may be detached from the Isocket 26, and the entire housing removedafter loosening the knuiled thumb screws II. The ow assembly unit maythus be serviced and/or replaced with a minimum of difficulty.

The inventor claims:

1. In an exhauster mechanism: an apertured support; an electricallyoperated blower assembly comprising a blower and a tubular housingmember passing through the aperture in the support; said housing memberhaving an end edge; a hollow dome-like deiiector member having an outeredge; the concave side of said hollow member being disposed toward theedge of the housing member, and the edge of the deflector member being.4 larger in diameter than the edge of the housing member; and meansmounting said delector on said housing so that said deflectorsubstantially completely overlies said housing member to dene a radialair flow path to said blower, comprising: a flange on one edge directedtoward the other edge, and spring fingers mounted on said other edge fordetachably engaging said flange.

2. In an exhauster mechanism: a support having an edge defining anaperture; an electrically operated blower assembly comprising a blowerand a tubular housing member passing through the aperture in thesupport; said housing member having a shoulder intermediate its lengthcontacting one side of the support at said aperture dening edge; aplurality of angularly spaced brackets carried by the housing member forholding the housing member to the support on that side of the supportthat is next to the shoulder; and a deflector member detachably mountedon that extremity of the housing which is on the said side of thesupport.

3. In an exhauster mechanism; an apertured support; an electricallyoperated blower assembly comprising a blower and a tubular housingmember passing through the aperture in the support; said housing memberhaving a shoulder intermediate its length contacting one side of thesupport; a plurality of angularly spaced brackets carried by the housingmember for holding the housing member to the support on that side of thesupport that is next'to the shoulder; a hollow dome-like reector memberhaving its concave side directed toward the end of the housing member;said end having a ange; and spring fingers mounted on the edge of thedelector member for detachably gripping said ange.

. .v HARRY GLASCOCK.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 703,897 Cooksey July 1, 19021,767,988 Knapp June 24, 1930 2,048,985 Akester July 28, 1936 2,049,856Mueller Aug. 4, 1936 2,134,142 Orear Oct. 25, 1938 2,157,609 Hopkins May9, 1939 2,225,349 Morse Dec. 17, 1940 2,232,225 Grant, Jr Feb. 18, 19412,278,581 Dexter Apr. 7, 1942 l FOREIGN PATENTS Number Country Date367,051 Germany Jan. 16, 1923 375,862 vGreat Britain July 4, 1932

